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Question

# P & Q are two points at the same distance and in the same horizontal plane form a current carrying vertical conductor. The point P is located towards the west and the point Q is towards the east. The current is vertically downwards. If BP & BQ be the net magnetic fields at P & Q then :BP=BQBP>BQBP<BQBP=2BQ

A
BP=BQ
B
BP>BQ
C
BP<BQ
D
BP=2BQ
Solution
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#### For in-finely long current carrying conductor; ⇒B=μoI4πa =Bα1a∵ distance from conductor of both points are same. so, magnetic field at both points are equal.⇒BP=BQ.

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